<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a :href="'/static/test.xlsx'">点击下载模版</a>
        </el-tag>
      </el-form-item>
      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="'http://localhost:9001/eduservice/subject/addSubject'"
          name="file">
          <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            @click="submitUpload">上传到服务器</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
    export default {
       data(){
         return {
              importBtnDisabled:false, //按钮是否禁用
              loading:false
         }
       },
      created(){//页面加载之前执行
      },
      methods:{
         //点击上传按钮
        submitUpload(){
          this.importBtnDisabled=true;
          this.loading=true;
          //js的上传
          this.$refs.upload.submit();
        },
        //上传成功
        fileUploadSuccess(){
          this.loading=false
          this.$message({
            type:'success',
            message:'导入课程成功！'
          })
          //跳转到列表页面
          //回到列表页面 路由跳转
          this.$router.push({path:'/subject/list'})
        },
        //上传失败
        fileUploadError(){
          this.loading=false
          this.$message({
            type:'success',
            message:'导入课程失败！'
          })
        }
      },
    }
</script>
<style scoped>

</style>
